Thread suction means on spinning frames



Oct. 11, 1955 BU 2,720,074

THREAD SUCTION MEANS ON SPINNING FRAMES Filed Sept. 29, 1952 2 Sheets-Sheet 1i INVENTOR. germ 171 ah/e Oct. 11., 1955 BUHLER 2,720,074

THREAD SUCTION MEANS ON SPINNING FRAMES Filed Sept. 29, 1952 2 Sheets-Sheet 2 INVENTOR. n' -nn Bu h is- BY W 43 v 4/ 1 flttamew.

United States Patent THREAD SUCTION MEANS ON SPINNING FRAMES Hermann Biihler, Winterthur, Switzerland Application September 29, 1952, Serial No. 312,012

Claims priority, application Switzerland September 28, 1951 2 Claims. (Cl. 57--56) My present invention relates to improvements in thread suction means on spinning and twisting frames. Known suction means comprise suction elements disposed alongside and underneath the drafting heads or the feed cylinders, which elements have nozzle-like apertures disposed between the delivery bobbins and the spinning or twisting spindles in the range of the drafting heads or, respectively, of the feed cylinders, a separate suction aperture being associated with each thread. A disadvantage of such known arrangement is that the nozzle apertures catch only those impurities and free fibers which are situated in the immediate neighborhood of the threads emerging from the drafting head or feed cylinder, whilst the particles floating freely in the air, such as dust and the like, do not move into the range of the nozzle apertures and, thus, cannot be sucked ofi, but mainly accumulate on the delivery bobbins and then are spun or twisted together With the thread.

By virtue of the suction means disclosed by my present invention, there is attained a technical advantage in that a suction slot is provided which extends along the frame past a plurality of spinning or twisting heads and thereby forms a part of a suction element which is connected to a source of vacuum.

One form of the invention is shown in the accompanying drawing, in which Fig. 1 shows an end view of the means, partly in section, and

Fig. 2 is a side view thereof.

In Fig. 1, stripping or roving bobbins 2 which conventionally rotate about their vertical axes and drafting heads 3 are mounted on the frame 1. The bobbins 2 are disposed in the creel in a side-by-side relation and one upon another in two groups extending along the frame and are accessible from different sides of the longitudinal frame. Between the two groups of bobbins a fiat upwardly tapered housing 4 is disposed. The housing 4 forms the suction element and the lower portion of said housing is provided on opposite sides thereof with two flared intake channels 5 which extend along the drafting mechanism and along a plurality of spinning stations. The flared intake channels 5 are symmetrically disposed on both sides of the housing 4 with respect to the median plane of the housing. Each of the intake channels is provided with a slot-like mouth 6. Each mouth 6 is situated a slight distance below the respective drafting mechanisms 3 so that the threads 8 led to the spinning spindle 7 pass the respective mouth 6. The length of the mouth of the intake channel is almost the same as the length of the housing so that the intersection of the air intake between the housing and the intake channel is substantially equal to the length of the mouth of the slot. The air current which enters the mouth of the slot flows directly through the intake channel into the housing and since the cross section of the channel is substantially the same as the cross section of the slot, there is no change in the air flow which would tend to increase the frictional loss when the suction means is operating within the tapered housing. Within the tapered housing 4 a further enlargement of the cross section is provided so that frictional losses are further minimized. The said spinning spindles 7 are conventionally mounted on frame parts 9.

In the upper tapered portion of the housing 4 a fan 10 is disposed which produces subpressure in the housing 4 so as to cause an air current in direction of the arrows (Fig. 1). By means of a wire mesh 11 mounted on top of the fan 10, which mesh acts as a filter, the aspirated air is freed of impurities such as threads, fibers and fly, and the air then flows out into the free atmosphere, which facilitates good air-conditioning in the working room.

Since the slot-like mouths extend on both sides past a plurality of spinning stations, suction action is present not only at the latter but also therebetween so that fly present in the vicinity of the threads is sucked oif. Furthermore, the occurrence of residual thread breakage is prevented in that a broken thread is drawn into the suction slot or, when using the well-known cleaning rollers, which may be retained for the purpose of better cleaning the drafting rolls, is fed to the cleaning roller by the air current.

The length of the suction element 4 and suction slot 6 depends on the volume of air to be circulated and the capacity of the fan 10. The suction slot 6 suitably extends past 20 to 40 spinning units.

Depending on the kind of ventilation system used, two or more of the housings 4 may be interconnected by tubes and operated through a common fan.

Further, the suction element 4 may comprise still further suction slots (not shown) which exert their suction effect at various points of the frame.

The arrangement described may be disposed as auxiliary means on existing spinning frames, is of very simple structure and aids existing air-conditioning systems.

The relatively large cross-sections of the suction slot which offer only a slight frictional resistance, permits the aspiration and the circulation of great quantities of air with a small power input.

What I claim is:

l. A thread suction means on textile and twisting frames comprising a centrally located flat housing provided at the base thereof with intake channels which are symmetrically arranged to project on opposite sides of the base with relation to the longitudinal median plane of said housing, each of said channels having an outer opening formed as a slot which extends over several spinning and twisting stations of the frame, said intake channels being directly connected to said housing over their entire length, and the length of the air intake at the point of jointure of said channel to the housing being approximately equal to the length of the mouth of said slot.

2. A suction means as in claim 1 wherein said intake channels are flared at the slot openings thereof and taper inwardly in a gradual curve towards said centrally located housing.

References Cited in the file of this patent UNITED STATES PATENTS 1,643,717 Linon Sept. 27, 1927 2,140,420 Eaddy Dec. 13, 1938 2,425,576 Thoma Aug. 12, 1947 2,425,577 Thoma Aug. 12, 1947 FOREIGN PATENTS 496,402 Belgium July 15, 1950 

